Lawn-mower sharpener



Feb. 4, 1930. R. c. NASH 1,745,439

' LAWN MOWER SHARPENER Filed Aug. 23, 1927 ln'uemar Y W? 6? Wash,

' I Attorng Patented Feb. 4, 1930 RE EL o. NASH, or FAIRFAX, OKLAHOMALAWN-MOWER S ARPENER m 3 Application filed August 23, 1927. Serial No.214,877.

' One object of my said invention is the provision of means for holdinga file and for throughout the length of the latter with a guiding orgauging the file on the fixed blade of a lawn mower while sharpening oneof I 5 the revolving blades, this in order to retain the file at thesame angle incident to the movement of the file against the revolvingblade view to assuring accurate sharpeningv of the revolving blade.

Another object of the invention is the provision of means for holdingand guiding a file on the fixed blade of a lawn mower for the accurateand expeditious sharpening of said blade. A c

To the attainment of the foregoing, the invention consists in theimprovement as hereinvention is used in sharpening the revolving'inafter described and definitely claimed.

In the accompanying drawings, forming a part of this specification IFigure l is a side elevation illustrating the preferred embodiment of myinvention and i a file held therein, the said embodiment having beenreduced to actual practice and successfully operated. I 5 Figure 2 is aninverted plan view of the same. A,

Figure 3 is a top plan View of the device.

Figure 4 is a view illustrating the manner in which the preferredembodiment of the blade of a lawn mower. e 7 Similar numerals ofreference designate corresponding parts in all of the views of thedrawings. A g In all of the views of the drawings, I show I a portion10f a file, and inthis connection may be of any other approved typeadapted for said purpose.

1 other elements a handle 2 which may be and I would have it distinctlyunderstood that the file may be of the ordinary type such as used forsharpening lawn mower blades or My novel device which is in the form ofa'file holder and gauge comprises among preferably is of wood.

" I I Fixed in the handle 2 is a metallic shank 3 which is enlarged atits end remote from the handle 2 as designated by 4 and is provided insaid enlarged'portion with a threaded aperture 5 for the reception andengagement of a set screw .6. The said set screw 6 is disposed asillustrated in Figures 1 and e 3 in order to clamp and securely hold thefile portion 1 against the guide portion 7 of my improvement whichportion 7 as clearly brought'out in Figures 1 and 2 is designed to restagainst the file portion land at the opposite side of said file portion1 with reference to'the inner end of the screw 6 and ed 1 the beforedescribed shank portion 4.

The guide portion 7 constitutes an important feature of my invention andby reference to Figures 1 and 2, it will be appreciatedthat the saidguide portion is prefere5 ablyin the form of an acute angle with one ofthe arms oft-he angle shorter than 'the otherarm andwith the said shortarm designated 1W7 connected with the enlarged portion 4 of theshank 3through the medium 31 of a bight 8 which in the preferable use of thedevice is designed to straddle one edge of the file portion 1 after themanner shown in'Figure 1e 7 In Figure 4 of thedrawings, the referencecharacter9 designates the fixed blade of a lawn mower, and the referencecharacter 10 designates one of the revolving blades.

When it is desired to sharpen the revolving bladev'of a lawnI1'lOW6l',',WllZ-h0lll dismantling 30 the mower, the revolving bladesare turned, until the end of one revolving blade is substantially evenwith the stationary blade. My novel device isthen placed upon therevolving blade 10, so that the file portion 1 restsupon the cuttingedge of the blade 10. in such a manner,that the portions 7 and 7 X fitbetween the blade 9 and the revolving blade 10, the portion 7 bearingagainst the edge of the stationary blade 9 and the portion 7 bearingagainst the sides ofethe re- 'volving blade 10. With the devicepositioned, as stated, the device is moved along-the edge ofthe-revolvingblade 10 and the file being maintained at the same angleincident to the sharpening of the edge of the blade 10 throughout itslength, the provision of an accurate bevelled cutting edge upon therevolving blade will be assured. After the sharpening of one oftheblades 10, the next 1 F revolving blade 10 is positioned, as stated,relative to the fixed blade 9, and the operation described is repeated,and so on, until all of the revolving blades 10 of the mower aresharpened. This latter will be better appreciated when it is stated thatin the sharpening of any .one of the revolving blades of a lawn mowerthat the arms 7*. of the portion 7 is placed against the edge of thefixed blade of a lawn mower in parallelism to said edge and ismovedagainst said edge while operating on the edge of the revolving bladethat is being sharpened with the result that the file is maintained atthe same angle on the edge of the revolving blade while being workedagainstsaid edge with the result that the sharpening of the edge of therevolving blade in an upward manner is assured.

My novel device is also adapted to be used to advantage in thesharpening of the fixed bladeof a lawn mower, the said blade beingpreferably removed from the lawn mower, and my novel device beingutilized to hold the file and to so guide the file relative to the bladethat the original bevel of the blade will be retained when the file isoperated against the edge ofthe blade.

I would further have it understood that when the set screw" 6 isloosened, the file or file portion 1 may be setat various angles in theholder with a View to utilizing all of the cutting faces or, surfaces onthe sides of the file. v

It will be apparent from the foregoing that with the use of my noveldevice a novice is enabled to sharpen a lawn mower in a short tainingthe V-shaped portion in spaced relation to the forward portion of theshank, a clamping screw disposed in the threaded aperture of the shank,and a handle on the rear portion of the shank; one of the arms of thesaid V-shaped portion being adapted to be guided against the fixed bladeof a lawn I mower incident to the longitudinal sliding movement of afile or file portion clamped between the screw and the V-shaped portion,against the edge of a revolving lawn mower blade.

In testimony whereof I aflix my signature. V r REUEL C. NASH.

period of time and this whilepreserving the scientific lines involvedoriginally in the cutting edges of the mower. v 7

It will also be apparent that my novel device is simple, compact,andinexpensive'in' construction, and in general, is well adaptedtorwithstand the uses to, which file. holders and analogous devices areordinarily subof the parts contained in the present and pre ferredembodiment of my invention in order to impart an exact'understanding ofsaid embodiment. I do not desire, however, to be understood as limitingmyself to V the construction shown, my invention being'defined by myappended claim within the scope of which modifications may be madewithout departure from my invention.

I clainizf A device for the purpose described comprising a base andguide portion of acute angle form or V-shape, a shank having an aperturein its forward portion and also hav- 7 ing said aperture threaded, abight connecting one arm of the V-shaped portion and the forward portionof the shank and main- I

